Broken Sram X3 Trigger Shifter

Hello to all. I have a Hardrock Disc 29er which has a broken face on the left hand Sram X3 7 spd. trigger shifter. I figured I would go ahead and change it out. However, I was wondering if I should possibly change both shifters out to something a touch better.

Any recommendations for upgrades? Maybe something that offers a good "bang for the buck"?

If I upgrade both shifters to something else, will I have to make changes to any other parts on the bike?

You can buy X.7's cheap on Ebay, and if you get the 2011 models, they have the "zero loss" feature that was only present on x.9's in prior years. I have set of the older x.7s that I bought new for $32 and a set of the 2011 version that I think were like $48. They both work very, very well.

For 7 speed SRAM you have two options, the X3 triggers or you can go with 3.0 Grip Shifters. You can also use 8 speed shifters and lock out the last shift with the low (L) set limiter on the rear derailleur. The numbers will not line up (you get 2-8 in back) but it does give you the option of upgrading. I've seen 8 speed X5 trigger shifters on Ebay which would be a pretty big upgrade from the X3 versions.